EP-4737187-A1 - BATTERY HIGH-VOLTAGE BOX, BATTERY PACK, AND VEHICLE

Abstract

Disclosed in embodiments of the present application are a battery high-voltage box, a battery pack, and a vehicle. The battery high-voltage box comprises a battery positive interface, a battery negative interface, a power transmission main loop, a controlled switch module, and a pre-charging loop; the power transmission main loop is separately connected to the battery positive interface and the battery negative interface, the controlled switch module is provided on the power transmission main loop, and the pre-charging loop is connected in parallel to the controlled switch module; the pre-charging loop is configured to pre-charge an external load when the pre-charging loop is turned on. An external load can be pre-charged by means of a pre-charging loop in a battery high-voltage box, so that a vehicle with a pre-charging loop or without a pre-charging loop can be pre-charged, thereby realizing the compatibility with vehicles of different original equipment manufacturers.

Inventors

• WU, KAI
• YANG, Zhengxing
• LIU, BIN

Assignees

• Contemporary Amperex Technology Co., Limited

Dates

Publication Date

20260506

Application Date

20240104

Claims (20)

1. A battery high-voltage box configured to connect a battery and an external load, wherein the battery high-voltage box comprises a battery positive interface, a battery negative interface, a power transmission main circuit, a controlled switch module, and a precharge circuit; the power transmission main circuit is connected to the battery positive interface and the battery negative interface respectively, the controlled switch module is disposed on the power transmission main circuit, and the precharge circuit is connected in parallel with the controlled switch module; and the precharge circuit, when in a conductive state, is configured to precharge the external load.
2. The battery high-voltage box according to claim 1, wherein the battery high-voltage box further comprises a main circuit positive interface configured to be connected to a positive electrode of an external load connector and a main circuit negative interface configured to be connected to a negative electrode of the external load connector.
3. The battery high-voltage box according to claim 2, wherein the controlled switch module comprises a main positive controlled switch module and/or a main negative controlled switch module, the main positive controlled switch module is connected to the battery positive interface and the main circuit positive interface respectively, and the main negative controlled switch module is connected to the battery negative interface and the main circuit negative interface respectively.
4. The battery high-voltage box according to claim 3, wherein the precharge circuit being connected in parallel with the controlled switch module comprises the precharge circuit being connected in parallel with the main positive controlled switch module or the precharge circuit being connected in parallel with the main positive controlled switch module.
5. The battery high-voltage box according to any one of claims 1 to 4, wherein the battery high-voltage box further comprises a charging interface configured to be connected to a charging socket.
6. The battery high-voltage box according to claim 5, wherein the battery high-voltage box further comprises a charging positive switch module and a charging negative switch module, and the charging interface comprises a charging positive interface and a charging negative interface; the charging positive interface is connected to the charging positive switch module, the charging positive switch module is connected to the battery positive interface, the charging negative interface is connected to the charging negative switch module, and the charging negative switch module is connected to the battery negative interface; the charging positive switch module is configured to connect the charging positive interface to the battery positive interface during charging of a battery cluster; and the charging negative switch module is configured to connect the charging negative interface to the battery negative interface during charging of the battery cluster.
7. The battery high-voltage box according to claim 6, wherein the battery high-voltage box further comprises a manual service disconnect, a first end of the manual service disconnect is connected to the battery positive interface, and a second end of the manual service disconnect is connected to a first end of the charging positive switch module.
8. The battery high-voltage box according to claim 1, wherein the battery high-voltage box further comprises a main circuit positive interface and a main circuit negative interface, the main circuit positive interface is configured to be connected to a positive electrode of an external load connector, the main circuit negative interface is configured to be connected to a negative electrode of the external load connector, and the controlled switch module comprises a main positive controlled switch module; and a first end of the main positive controlled switch module is connected to the battery positive interface, and a second end of the main positive controlled switch module is connected to the main circuit positive interface.
9. The battery high-voltage box according to claim 8, wherein the precharge circuit is disposed in a main positive circuit in the power transmission main circuit, a first end of the precharge circuit is connected to the first end of the main positive controlled switch module, and a second end of the precharge circuit is connected to the second end of the main positive controlled switch module.
10. The battery high-voltage box according to claim 1, wherein the battery high-voltage box further comprises a main circuit positive interface and a main circuit negative interface, the main circuit positive interface is configured to be connected to a positive electrode of an external load connector, the main circuit negative interface is configured to be connected to a negative electrode of the external load connector, and the controlled switch module comprises a main negative controlled switch module; and a first end of the main negative controlled switch module is connected to the battery negative interface, and a second end of the main negative controlled switch module is connected to the main circuit negative interface.
11. The battery high-voltage box according to claim 10, wherein the precharge circuit is disposed in a main negative circuit in the power transmission main circuit, a first end of the precharge circuit is connected to the first end of the main negative controlled switch module, and a second end of the precharge circuit is connected to the second end of the main negative controlled switch module.
12. The battery high-voltage box according to claim 1, wherein the battery high-voltage box further comprises a main circuit positive interface and a main circuit negative interface, the controlled switch module comprises a main positive controlled switch module and a main negative controlled switch module, the main circuit positive interface is configured to be connected to a positive electrode of an external load connector, and the main circuit negative interface is configured to be connected to a negative electrode of the external load connector; and a first end of the main positive controlled switch module is connected to the battery positive interface, a second end of the main positive controlled switch module is connected to the main circuit positive interface, a first end of the main negative controlled switch module is connected to the battery negative interface, and a second end of the main negative controlled switch module is connected to the main circuit negative interface.
13. The battery high-voltage box according to claim 12, wherein the precharge circuit is disposed in a main positive circuit in the power transmission main circuit, a first end of the precharge circuit is connected to the first end of the main positive controlled switch module, and a second end of the precharge circuit is connected to the second end of the main positive controlled switch module, or the precharge circuit is disposed in a main negative circuit in the power transmission main circuit, a first end of the precharge circuit is connected to the first end of the main negative controlled switch module, and a second end of the precharge circuit is connected to the second end of the main negative controlled switch module.
14. The battery high-voltage box according to claim 3, wherein the precharge circuit comprises a precharge switch module and a precharge resistor; a first end of the precharge switch module is connected to the first end of the main positive controlled switch module, a second end of the precharge switch module is connected to a first end of the precharge resistor, and a second end of the precharge resistor is connected to the second end of the main positive controlled switch module, or a first end of the precharge switch module is connected to the first end of the main negative controlled switch module, a second end of the precharge switch module is connected to a first end of the precharge resistor, and a second end of the precharge resistor is connected to the second end of the main negative controlled switch module.
15. The battery high-voltage box according to claim 5, wherein the battery high-voltage box further comprises a charging positive switch module and a charging negative switch module, and the charging interface comprises a charging positive interface and a charging negative interface; a first end of the charging positive switch module is connected to the battery positive interface, a second end of the charging positive switch module is connected to the charging positive interface, a first end of the charging negative switch module is connected to the battery negative interface, and a second end of the charging negative switch module is connected to the charging negative interface; the charging positive switch module is configured to connect the charging positive interface to the battery positive interface during charging of a battery cluster; and the charging negative switch module is configured to connect the charging negative interface to the battery negative interface during charging of the battery cluster.
16. A battery pack, wherein the battery pack comprises the battery high-voltage box according to any one of claims 1 to 15.
17. The battery pack according to claim 16, wherein the battery pack further comprises a battery cluster and an external load connector; a positive electrode of the battery cluster is connected to the battery positive interface, a negative electrode of the battery cluster is connected to the battery negative interface, a positive electrode of the external load connector is connected to the main circuit positive interface, and a negative electrode of the external load connector is connected to the main circuit negative interface; and the external load connector is configured to supply power to an external load when the battery pack is at a vehicle end; and is further configured to transmit electric energy input by a battery swapping station to charge the battery cluster when the battery pack is at the battery swapping station.
18. The battery pack according to claim 17, wherein the battery pack further comprises a charging socket, a positive electrode of the charging socket is connected to the charging positive interface, and a negative electrode of the charging socket is connected to the charging negative interface; and the charging socket is configured to transmit electric energy input by a charging gun to charge the battery cluster.
19. The battery pack according to claim 18, wherein the battery pack further comprises a housing, and the battery high-voltage box is disposed in the housing; and the external load connector and the charging socket are both disposed on the housing.
20. A vehicle, wherein the vehicle comprises the battery pack according to any one of claims 16 to 19.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS The present application claims priority to Chinese Patent Application No. 202321669016.2, filed on June 28, 2023 and entitled "BATTERY HIGH-VOLTAGE BOX, BATTERY PACK, AND VEHICLE", which is incorporated herein by reference in their entireties. TECHNICAL FIELD The present application relates to the field of battery swapping technologies, and specifically to a battery high-voltage box, a battery pack, and a vehicle. BACKGROUND With the development of technology, the penetration rate of new energy vehicles is increasingly high. Currently, in the field of new energy battery swapping, the battery system is generally integrated within the battery pack. However, due to differences in the multi-in-one architecture of vehicles from different original equipment manufacturers, the requirements for the battery pack vary, resulting in incompatibility of the battery pack with vehicles from different original equipment manufacturers. SUMMARY The present application proposes a battery high-voltage box, a battery pack, and a vehicle, aiming to address the technical problem that battery packs cannot be compatible with vehicles from different original equipment manufacturers. According to a first aspect, an embodiment of the present application proposes a battery high-voltage box configured to connect a battery and an external load, where the battery high-voltage box includes a battery positive interface, a battery negative interface, a power transmission main circuit, a controlled switch module, and a precharge circuit; the power transmission main circuit is connected to the battery positive interface and the battery negative interface respectively, the controlled switch module is disposed on the power transmission main circuit, and the precharge circuit is connected in parallel with the controlled switch module; andthe precharge circuit, when in a conductive state, is configured to precharge the external load. This embodiment proposes a battery high-voltage box configured to connect a battery and an external load, where the battery high-voltage box includes a battery positive interface, a battery negative interface, a power transmission main circuit, a controlled switch module, and a precharge circuit, and the precharge circuit, when in a conductive state, is configured to precharge the external load, which addresses the technical problem in the prior art where vehicles from some original equipment manufacturers are equipped with precharge circuits while others are not, resulting in inconsistent requirements for the types of battery packs and causing the same type of battery pack impossible to be applied to vehicles from different original equipment manufacturers, thereby achieving compatibility with vehicles from different original equipment manufacturers. In some embodiments, the battery high-voltage box further includes a main circuit positive interface configured to be connected to a positive electrode of an external load connector and a main circuit negative interface configured to be connected to a negative electrode of the external load connector. In the embodiments, the battery high-voltage box includes a main circuit positive interface configured to be connected to the positive electrode of the external load connector and a main circuit negative interface configured to be connected to the negative electrode of the external load connector. The external load can be connected through the main circuit positive interface and the main circuit negative interface, thereby enabling precharging of the external load in a conductive state of the precharge circuit, so that the battery high-voltage box can be applied to vehicles from different original equipment manufacturers, improving the compatibility of the battery high-voltage box. In some embodiments, the controlled switch module includes a main positive controlled switch module and/or a main negative controlled switch module, the main positive controlled switch module is connected to the battery positive interface and the main circuit positive interface respectively, and the main negative controlled switch module is connected to the battery negative interface and the main circuit negative interface respectively. In the embodiments, the controlled switch module includes a main positive controlled switch module and/or a main negative controlled switch module, the main positive controlled switch module is connected to the battery positive interface and the main circuit positive interface respectively, and the main negative controlled switch module is connected to the battery negative interface and the main circuit negative interface respectively, which addresses the technical problem in the prior art where vehicles from some original equipment manufacturers are equipped with precharge circuits while others are not, resulting in inconsistent requirements for the types of battery swapping packs and causing the same type of battery swappi